what does code B1242 mean for my Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle's battery to ensure safety during repairs.

2. Remove the Refrigerant Temperature Sensor

• Locate the refrigerant temperature sensor on the A/C line.
• Disconnect the electrical connector from the sensor.
• Use an appropriate socket or wrench to remove the sensor from the A/C line.

3. Inspect and Replace the Sensor

• Inspect the old sensor for any signs of damage or corrosion.
• If necessary, install a new refrigerant temperature sensor by threading it into the A/C line and tightening it to the manufacturer's torque specifications (usually around 15-20 ft-lbs).
• Reconnect the electrical connector securely.

4. Recharge the A/C System

• If refrigerant levels were low, recharge the A/C system with the correct type and amount of refrigerant (usually R-134a or R-1234yf depending on the model).
• Use a refrigerant gauge to ensure proper levels.

5. Reconnect Battery and Test A/C System

• Reconnect the vehicle's battery.
• Start the engine and turn on the A/C. Monitor for proper cooling and check for any leaks.